New File type Icons
Replace you're default file type icons, with these new icons.
Designed to give you more contrast between you're open files.
How to install
You can install the New File Icons trough the Tools menu.
Tools > New File Icons > Install New File Icons
Note: You need to run Komodo as administrator (because the addon needs to make changes in the install directory).
How to get the old icons back?
You need to uninstall Komodo and Reinstall Komodo to get the old icons back.
Note: Reinstalling Komodo will preserve you're settings, the are stored in a separate profile folder.